Support for mod "Scanning Radar"
In mod Scanning Radar, those radars perform polar sweep, giving circular coverage area. A square grid for vanilla radars is longer good for full coverage of the map.
Mathematically, a regular hexagonal grid would be used for tiling. But due to the chunk calculations in the game, a bit of asymmetry in scanning radar locations would actaully be better. This mod perform a careful calculation (which is much more complicated than square grid) to give the optimal quasi-regular hexagonal grid, in the sense that it gives the least overlapping while not leaving any holes in the coverage.
To activate the quasi-hexagonal grid calculation, under "Options" → "Mod settings" → "Per Player", tick the checkbox "Align for mod Scanning Radar". Input the value of signal R to the field of "Radar reveal radius". After that, first calibrate like the vanilla radar grids.
The following screenshot demonstrates placement by aligning to such grid. It is using radius (signal R) of 10 chunks. It also has near radius (signal N) of 6 chunks, to highlight radar locations better.